Wiseco Forged Dished Piston Kit (79.0mm, 8.7:1 CR) - NA6 Miata (90-93)

Wiseco Professional Series forged piston kit for the Mazda B6 1.6L 16-valve engine, the engine used in the 1990-1993 Mazda Miata (NA6). Wiseco catalogs it under "Mazda Miata 1.6L 16V Turbo (B6)". The set of four pistons has a -13 cc dish crown and is sized for a 79.00 mm bore, which Wiseco lists as a 0.040 in oversize, so the block must be bored and honed to suit.

• Wiseco-listed 8.7:1 compression ratio with a -13 cc dish; Wiseco calculates this at 83.5 mm stroke, 36 cc head chamber, 1.1 mm head gasket, +0.15 mm deck clearance and 206.5 mm block height, so the final ratio depends on your head, gasket and deck.
• 79.00 mm bore (0.040 in oversize), 31.95 mm compression height, full round forging in 2618 aluminum.
• Ring set included: Wiseco 7900XX, 1.0 mm / 1.2 mm / 2.8 mm ring package.
• Wrist pins included: Wiseco S623, 20 mm (0.787 in) x 2.500 in, 5115 steel; Wiseco pins are offset, the same as OEM, for quiet operation.
• Engineered, forged and machined in the USA; fully machined crown, precision ring grooves with anti-detonation groove, forced pin oiling.
• ArmorGlide skirt coating for seizure resistance, lower friction and quieter operation.

Fitment: Mazda B6 1.6L 16-valve engine. Wiseco lists this kit by engine and does not publish model years; 1990-1993 Mazda Miata (NA, 1.6L) is shown because that car uses the B6 engine. Requires boring to 79.00 mm. Have a machine shop measure the bore and set piston-to-wall clearance before assembly.

Part number: Wiseco K554M79

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